Hi Guys,
i can confirm better performance with 4.14.29 - ~900 MBits with iperf2 in one way -~ 500 - 600MBits with iperf2 in duplex in both directions This wasnt the case with 4.17.9, not with 4.18, 4.19 or the 5.0 series..... How can i help further ? regards, Simon Am 06.02.2019 um 11:36 schrieb Emiliano Ingrassia: > Hi Martin, Hi Simon, > > On Mon, Feb 04, 2019 at 03:34:41PM +0100, Martin Blumenstingl wrote: >> On Thu, Jan 17, 2019 at 10:23 PM Simon Huelck <simonm...@gmx.de> wrote: >> [...] >>>>> I got problems with my ODROID c2 running on 4.19.16 ( and some releases >>>>> earlier ). the stmmac / dwmac driver doesnt provide the 800M/900M >>>>> performance that i was used to earlier. >>>>> > Simon, did you ever reach 1 Gbps full duplex speed? > If yes, what was the kernel version did you use? > >>>>> Now im stuck near 550M/600M in the same environment. but what really >>>>> confuses me that duplex does hurt even more. >>>> interesting that you see this on the Odroid-C2 as well. >>>> previously I have only observed it on an Odroid-C1 >>>> >>>>> PC --- VLAN3 --> switch --VLAN3--> ODROID >>>>> >>>>> NAS <-- VLAN1 -- switch <-- VLAN1-- ODROID >>>>> >>>>> >>>>> this means when im doing a iperf from PC to NAS, that my ODROID has load >>>>> on RX/TX same time (duplex). this shouldnt be an issue , all is 1GBits >>>>> FD. And in the past that wasnt an issue. >> +Cc Emiliano who has seen a similar duplex issue on his Odroid-C1: [0] >> (please note that all kernels prior to v5.1 with the pending patches >> from [1] applied are only receiving data on RXD0 and RXD1 but not on >> RXD2 and RXD3) >> >> Emiliano, can you confirm the duplex issue observed by Simon is >> similar to the one you see on your Odroid-C1? >> > It could be but, if I understand correctly, Simon is limited in > speed also in half duplex transmission (~550/600 Mbps), while we can > reach at least 900 Mbps. > >>>>> >>>>> Now what happens: >>>>> >>>>> - benchmark between PC - ODROID is roughly 550M >>>>> >>>>> - benchmark between NAS - ODROID is roughly 550M >>>>> >>>>> - benchmark between PC - NAS is only around 300M >>>>> >>>>> >>>>> and like i said i was easliy able to hit 800 or even 900M to my NAS >>>>> earlier. I applied some .dtb fixes for interrupt levels for the >>>>> meson-gx.dtsi and meson-gxbb-odroid-c2.dtb, which will be mainlined , >>>>> but the effect stayed identical. >>>> good that you have the interrupt patches already applied >>>> I believe it don't fix any performance issues - it's a fix for the >>>> Ethernet controller seemingly getting "stuck" (not processing data >>>> anymore). however, that already rules out one potential issue >>>> >>>>> are you aware of this problem ? Earlier kernel versions were all >>>>> perfectly fine and i stepped ( self compiled) kernel through all major >>>>> releases since odroid c2 was mainlined. >> Guiseppe, Alexandre: what kind of data do you need from us if we see >> the speeds drop (in both directions) when we send and receive at the >> same time? >> >> [...] >>> the problem is that i dont have these kernel sources anymore :-(. but i >>> can provide some testing and numbers. maybe i dig if i got these kernel >>> configs somewhere around but i did not change much during migrating >> do you remember the kernel version where it worked fine? >> >>> im using a zyxel gs1900-8 switch and a qnap ts231p , and as i said i >>> didnt change my setup. i was able to hit 100MByte/s from my NAS , so >>> close to the benchmarks of 900MBit/s >> I typically only do small transfers or I have traffic only in one direction. >> thus it's likely that I missed this in my own tests >> >> >> Regards >> Martin >> >> >> [0] >> http://lists.infradead.org/pipermail/linux-amlogic/2018-December/009679.html >> [1] https://patchwork.kernel.org/cover/10744905/ > Regards, > > Emiliano
